Tire deflating valve with pressure gauge



Sept. 23, 1952 T. E. PARROTT TIRE DEFLATING VALVE WITH PRESSURE GAUGE Filed Feb. 21, 1947 ATTCIRNEYB aten'ted (Sept. Z,

, Thisinvhtion relate ingythe pressure of air i An object of the inven structure for a 'gauge sure of a pneumatic deflationv fuse, either-upon the the gauge will register escapes, so that the user amount of air pressure that is times.

A 'Al'pplic ation tire 'at With the above and other claimed and illustrated in drawing in which:

"1 l i s to ,ti:r.'e;.gauges -for atestnpneumatic tires.V

tion is to Yprovide a valve TIRE DEELATING y-vAj-Lvli WITHl franssunneauen.

.Thomas E. Parrott, Tulsa, Okla.v

thatwiirregister the pres- -all times when vin A orlin'ationthereof. -In the dev-ice embodyingthe'present invention,

the amount of air that thereof knows the exact in the tire at all objects and advantages in view, the invention consists of the novel details of construction,

nation of parts more arrangement and combifully hereinafter described,

the accompanying Figure 1 is a longitudinal sectional view of an embodiment of the invention;

Figure 2 is an enl in elevation, and par Figure 4 is a sectional view on Figure 2;

view of arged detailed view, partly tly in section, of the chuck the chuck end;

the line 4-4 of Figure 5 is a sectional View on the line 5-5 of Figure 2 and Figure 6 is a sectional view on the line 6-6 of Figure 2.

Referring more in reference numeral I having the inlet end flange I2. The inlet detail to the drawing, the

designates the air chuck II bounded by the annular end II valve depressing projection I with the relatively spaced air inlet openings I4,

where the projection I5 in the chuck I9. A rubber the projection provides an lve stem and chuck.

air inlet passage jacket I6 surrounding air tight seal between the va is provided with the 3 which is provided I3 communicates with the Threadedly connected to the outlet end oi. the

chuck is the tubular air ch apertured at I1 at its opposi gauge guide I8 and permit outwardly of the chamber proper indicia thereo Il, the

matic tire being tested.

24 surrounds the screw 20 intero the gauge I9,

end, and the smaller spring mediate of the disc gauge I9, adjusted to properly tire to be tested.

amber te end to mount the the gauge I9 to extend I6' to indicate by the pressure in the pneu- IB', which is the cup washer ZI and g disc 22, to the inner end Surrounds end. while a 22, and the inner end of and the tension indicate of these springs is the pressure in the Within the i chuck Hl, and iparallel to the :passage I5, `is, :a bore 25 in ywhich ais fthreade'dly -mounted :the cup-shaped valve housing26, tin -which'isthreadedly :mounted the outlet valve .2 1 having therconical shaped valve head 23,which is adapted to be adjusted with relation "tothe valve'seat 29in1the housing 25;- The adjustment of the valve 21 with relation to the valve seat 29 is very important. If too much air escapes past the valve 21 air pressure will show excessive drop when the relief valve is opened. If not enough air is passing through the valve 21 it will take a longer period of time to reduce the pressure in the tire to the proper level. However, proper adjustment of the valve 21 will overcome both of these drawbacks and permit the gauge to operate correctly. Adjustment of the valve 21 is made by removing the air chamber I6 and then checking the gauge with the air chamber I6 in place this procedure being followed until the proper opening is determined. Once the proper opening is determined n o further adjustment of the valve 21 is necessary. The valve 21 has a slotted head 30 and a central port 3l communicates with the transverse port 32, whereby air leaving the chamber I6 will pass through the valve housing 26 to impinge upon the gasket seal 33, which is mounted on the shaft 34 at one end thereof, and a gasket 35 is mounted in the seal 33 to engage the truncated conical end 36 of the tubular outlet valve housing 31, which is provided with outlet ports 38, and a spring 39 interposed between the housing 26 and seal 33 forces the gasket against the conical end to prevent air from escaping from the chuck Ill. The shaft, at its outer end, has the corrugated deector button 39 secured thereto by a set screw 40. The button 39 is slidably mounted in the recess 4I in the chuck I0, and the bottom of the button and recess 4I are bevelled to retain the button therein.

It will be noted that a gasket 42 and the disc 43, with the central aperture 44, is interposed between the I0, when these two members are threadedly connected together.

In use, the chuck is placed on the valve stem of the tire to determine the amount of air pressure in the tire. If it is low, air is admitted into the tire by an air chuck. Itis again tested, and if the pressure is too high, the pressure is bled from the tire by depressing the button 39. As the air escapes, the gauge I9 will retract until the proper pressure is reached, when the button is rieleased and the gauge removed from the valve s em.

end of the chamber I6 and chuck- There has thus been provided a gauge which will properly test the air pressure in a pneumatic tire, and will bleed the air from the tire if necessary, to obtain the right pressure in the tire, the gauge at all times indicating the pressure in the tire until the right pressure is reached.

It is believed that from the foregoing description, the operation and construction of the invention will apparent to those skilled in the art,

and it is to be understood that changes in the mino;` details of construction, arrangement and combination of parts may be resorted to, provided they fall within the spirit of the invention and the scope of the appended claim.l

Having thus described the invention, what is claimed as new and Letters Patent is:

A valve structure for relieving pressure from a tire gauge comprising a casing having an open ended chamber, an inlet passage to said chamber andr anY outlet bore from said chamber, a cup'- shaped valve housing vmounted in the chamber end of said bore, a manually adjustable valve 4in said housing cooperating with a seat therein to control flow through said bore, a second valve housing in the opposite end' of said bore having desired to be secured byfl manual opening of said valve seal.

THOMAS E. PARROTT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 898,213 Gibson Sept. 8, 1908 1,160,285 Hobbs Nov. 16, 1915 1.334.874 Miller Mar. 23. 1920 1,891,853 Turner Dec. 20, 1932 2,228,481 Parsons Jan. 14, 1941 FOREIGN PATENTS Number Country Date 328,750 France of 1904 France of 1920 

